gpt-5.5 tool calling regression

What version of Codex CLI is running?

codex-cli 0.143.0

What subscription do you have?

Plus

Which model were you using?

gpt-5.5

What platform is your computer?

Darwin 25.5.0 arm64 arm

What terminal emulator and version are you using (if applicable)?

_No response_

Codex doctor report

What issue are you seeing?

All models across the gpt-5.5 (Low, medium, high, xhigh) all fail with the same error:

  unsupported call: exec_commandexec_command

gpt-5.4 doesn't have this problem.

What steps can reproduce the bug?

Run codex in a workspace with sufficient permissions. Use the following prompt:

List contents of this directory, and if you face any tool call erorrs - report them.

What is the expected behavior?

_No response_

Additional information

_No response_